EP3296125B1 - Gleitschutzanordnung mit schutzelement - Google Patents

Gleitschutzanordnung mit schutzelement Download PDF

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Publication number
EP3296125B1
EP3296125B1 EP16189019.9A EP16189019A EP3296125B1 EP 3296125 B1 EP3296125 B1 EP 3296125B1 EP 16189019 A EP16189019 A EP 16189019A EP 3296125 B1 EP3296125 B1 EP 3296125B1
Authority
EP
European Patent Office
Prior art keywords
friction wheel
operating arm
protective member
tire
skid arrangement
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP16189019.9A
Other languages
English (en)
French (fr)
Other versions
EP3296125A1 (de
Inventor
Ragnvald Andersson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
VBG Group AB
Original Assignee
VBG Group AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by VBG Group AB filed Critical VBG Group AB
Priority to EP16189019.9A priority Critical patent/EP3296125B1/de
Priority to PCT/EP2017/073134 priority patent/WO2018050744A1/en
Priority to US16/333,072 priority patent/US10807414B2/en
Publication of EP3296125A1 publication Critical patent/EP3296125A1/de
Application granted granted Critical
Publication of EP3296125B1 publication Critical patent/EP3296125B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B39/00—Increasing wheel adhesion
    • B60B39/003—Vehicle mounted non-skid chains actuated by centrifugal force
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/24—Perforating, i.e. punching holes
    • B21D28/26—Perforating, i.e. punching holes in sheets or flat parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B2900/00—Purpose of invention
    • B60B2900/50—Improvement of
    • B60B2900/551—Handling of obstacles or difficult terrains
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B2900/00—Purpose of invention
    • B60B2900/70—Adaptation for
    • B60B2900/721—Use under adverse external conditions

Definitions

  • the present invention relates to an anti-skid arrangement having a protective member and to a method for producing such a protective member.
  • Trucks, buses and emergency vehicles are examples of vehicles that for safety and other reasons may be equipped with various types of anti-skid arrangements that enhance traction and braking in slippery road conditions caused by for example snow and ice.
  • a common type of anti-skid arrangement utilizes chains that can be engaged under the tread of a tire to improve road grip.
  • the chains are mounted on a friction wheel which is connected to the underside of the vehicle via an operating arm.
  • the operating arm can swing the wheel into and out of a position in which wheel abuts against the side of the tire, the rotation of which causes the wheel to rotate and the chains to be thrown in under the tread of the tire.
  • a simpler alternative is to use a separate protective member in the form of a U-shaped clip.
  • the clip is pressed onto the operating arm towards the friction wheel, such that the legs of the clip thereby cover the space between the wheel and the operating arm.
  • a power unit adapted to move a rotor carrying traction chains into and out of contact with a tire of an automobile is disclosed in US 2,543,876 .
  • Another anti-skid arrangement can be found in WO 2007/068466 .
  • an anti-skid arrangement for a vehicle with tires comprising a friction wheel having mounted thereon several chains intended to be thrown under a tire in order to increase friction between the tire and the ground; and an operating arm rotatably connected to the friction wheel, wherein the operating arm is adapted to be connected to the vehicle and to bring the friction wheel into frictional engagement with the tire.
  • the anti-skid arrangement has a protective member comprising an inner part arranged around a rotation axis of the friction wheel and between the hub and the arm, wherein an extension of the inner part in a radial direction is less than 50% of a radius of the friction wheel.
  • the protective member also comprises an outer part having a longitudinal extension radially away from the rotation axis, wherein a transverse extension of the outer part in a plane perpendicular to the rotation axis is substantially limited to a width of the operating arm parallel to the plane, and wherein the outer part further has two side walls substantially perpendicular to the plane and abutting against opposite sides of the operating arm.
  • a method for manufacturing a protective member for an anti-skid arrangement comprising a friction wheel having mounted thereon several chains intended to be thrown under a tire of a vehicle in order to increase friction between the tire and the ground, the friction wheel further being rotatably connected to an operating arm adapted to be connected to the vehicle and to bring the friction wheel into frictional engagement with the tire, wherein the protective member is intended to be mounted at an axis of rotation of the friction wheel in order to prevent items being introduced in a space between the friction wheel and the operating arm.
  • the method comprises: providing a flat T-shaped piece, the T-shaped piece having a leg and a head, the head having two side portions and an intermediate portion located between the side portions; bending the side portions towards each other to form two side walls extending substantially perpendicularly from the intermediate portion; and forming a hole in the leg.
  • the method may further comprise a step of punching the leg so that a central zone surrounding the hole is pressed out of a plane of the leg.
  • each side wall makes an angle with the plane which is 90 degrees or which differs from 90 degrees by less than 20 degrees, alternatively less than 10 degrees or less than 5 degrees. This is also how the two side walls extending "substantially perpendicularly" from the intermediate portion should be understood.
  • transverse extension of the outer part being “substantially limited” to the width of the operating arm is meant that the transverse extension of the outer part is less than 20% greater than the width of the operating arm, alternatively less than 15%, less than 10% or less than 5 %.
  • the protective member described above helps to prevent the chains, as well as other items thrown up from the road surface, from getting stuck between the friction wheel and the operating arm.
  • the protective member is simple and fast to produce using standard tools and inexpensive materials. Integrating the protective member with existing types of anti-skid arrangement requires only very minor changes to the production process thereof.
  • the protective member is also robust and reliable, thereby ultimately reducing end-user costs.
  • a protective member according the present invention will fit anti-skid devices having different distances between the friction wheel and the operating arm. It also allows slight movement between the operating arm and the friction wheel during operation.
  • the extension of the inner part in the radial direction may be less than 20%, and preferably less than 10%, of the extension of the friction wheel in the radial direction.
  • the friction wheel may comprise a bearing arranged on the rotation axis, an inner race of the bearing being fixed relative to the operating arm.
  • the inner part may have a central zone abutting against the inner race and a peripheral zone separated from the friction wheel in a direction parallel to the rotation axis. A particularly fast and simple way of providing such a central zone and peripheral zone is by punching the inner part.
  • the inner part may be adapted to act as a protective cover for the bearing.
  • a protective cover for example a washer, arranged between the operating arm and the bearing.
  • Adapting the inner part to act as the protective cover reduces the number of components of the anti-skid arrangement, something which may reduce costs as well as simplify the production process.
  • the protective member is especially advantageous to make the protective member out of a material that is capable of plastic deformation, for example sheet metal. Using such a material facilitates the provision of a protective member having precisely the desired shape, and it is possible to use simple tools.
  • Figures 1a and 1b show an anti-skid arrangement 1 which is mounted to the underside of a vehicle (not shown) and which is movable between an inactive position (see Figure 1a ) and an active position (see Figure 1b ).
  • the anti-skid arrangement 1 has a circular friction wheel 2. In the inactive position, the friction wheel 2 is not in frictional engagement with a tire of the vehicle, whereas, in the active position, the friction wheel 2 is in frictional engagement with a tire of the vehicle.
  • the vehicle is provided with a system that enables the driver of the vehicle to activate the anti-skid arrangement 1 by pushing a button on a dashboard inside the vehicle.
  • an operating arm 3 mounted to the vehicle and the friction wheel 2 moves so that the friction wheel 2 is brought into frictional engagement with a rotating tire.
  • the operating arm 3 is thus mounted to the vehicle so that the anti-skid arrangement 1 is movable between the active position and the inactive position.
  • the operating arm 3 may for example be pivotally mounted to the vehicle.
  • the frictional engagement between the tire and the friction wheel 2 causes the friction wheel 2 to start to rotate and chains 4 mounted to the friction wheel 2 to be flung radially outwards by the centrifugal force and successively drawn in under the tire tread.
  • the vehicle has two anti-skid arrangements 1 arranged to cooperate with a respective one of two oppositely arranged tires.
  • the tires to which the friction wheels 2 are brought into contact are preferably driving tires for maximum increase in road grip.
  • the plane in which the friction wheel 2 rotates advantageously makes an angle ⁇ with the horizontal as the chains 4 are then less likely to be dragged along the ground when they are not underneath the tire.
  • the radius R of the friction wheel 2 is typically in the range 60-120 mm.
  • the friction wheel 2 is rotatable about a rotation axis A.
  • the friction wheel 2 comprises a circular hub 5.
  • the hub 5 is made of a hard and durable material, typically a metal, such as steel or aluminum.
  • a ring 6 is attached around the hub 5.
  • the ring 6 may for example be vulcanized to the hub 5.
  • the ring 6 may be clamped by the hub 5.
  • the hub 5 typically comprises an upper part and a lower part which are adapted to clamp the ring 6.
  • the ring 6 abuts against the side of a tire.
  • the ring 6 is thus intended to be brought in frictional engagement with a tire.
  • the ring 6 is therefore typically made of a high-friction material, such as rubber or a similar material.
  • the outer surface of the ring 6, i.e. the surface of the ring 6 that intended to be in contact with a tire may have a patterned structure for improved grip with the tire.
  • the pattern may for example be formed by ribs, ridges, recesses and/or protrusions.
  • the outer surface of the ring 6, is inclined with respect to the rotation axis A of the friction wheel 2. More precisely, the outer surface is curved radially inward as seen in the upward direction in Figure 2 . The reason for this is that the friction wheel 2 is typically inclined with respect to the horizontal when in contact with the tire, because the chains 4 are then less likely to drag along the ground during the part of their rotation where they are not underneath the tire, and making the outer surface of the tire slightly inclined too may increase the contact area, and hence the frictional engagement, between the ring 6 and the tire.
  • the chains 4 are mounted to the lower side of the hub 5 as seen in Figure 2 , for example via an annular plate attached the hub 5. All of the chains 4 have substantially the same length which typically is in the order of a few dm.
  • the chains 4 are made of a hard material that is capable of withstanding substantial wear and tear, such as steel.
  • Several screws 7 clamp the hub 5 and the plate with the chains 4 together. Nuts may be threaded onto the screws 7 at the lower side of the hub 5. In the illustrated example, the heads of the screws 17 are lowered into fixating holes in the upper part 6b, facilitating mounting of the nuts. Alternatively, the screws 7 may be self-tapping screws engaging pre-drilled holes in the hub 5.
  • the operating arm 3 is mounted to the upper side of the hub 5 as seen in Figure 2 , i.e. the side opposite to the side where the chains 4 are mounted to the hub 5.
  • the operating arm 3 may comprise several straight and bent portions.
  • the friction wheel 2 is rotatably mounted to the operating arm 3 at the rotation axis A.
  • a central bolt 8 extending along the rotation axis A through the hub 5 holds the operating arm 3 and the friction wheel 2 together.
  • a washer 9 and a protective member 10 are arranged between the operating arm 3 and the friction wheel 2.
  • the washer 9 is arranged between the protective member 10 and the operating arm 3, so the protective member 10 is arranged between the friction wheel 2 and the washer 9.
  • the protective member 10 helps to "close” the space between friction wheel 2 and the operating arm 3 so that the chains 4, as well as other items such as dirt, ice, etc., thrown up from the road surface, do not get stuck in the space between the friction wheel 2 and the operating arm 3.
  • the washer 9 may in some embodiments be wedge-shaped and cooperate with a bent central bolt 8 in the manner described in the Swedish patent with publication number SE 503505 .
  • the protective member 10 has an inner part 11 arranged around the rotation axis A.
  • a hole 12 is provided in the inner part 11.
  • the outer radius r of the inner part 11 is less than 50% of the radius R of the friction wheel 2.
  • the inner part 11 has an annual, radially central zone 13 which surrounds the hole 12.
  • a peripheral zone 14 surrounds the central zone 13.
  • the central zone 13 has been axially displaced relative to the peripheral zone 14.
  • the central zone 13 and the peripheral zone 14 do not lie in the same plane.
  • the central zone 13 may abuts against the inner race of a bearing (not shown) which is arranged inside the hub 5 and which enables the friction wheel 2 to rotate relative to the operating arm 2 and the protective member 10.
  • the inner part 11 may then act as a protective cover for the bearing.
  • a washer, or the like, arranged between the inner part 11 and the friction wheel 2 may instead act as a protective cover for the bearing or there may be no such protective cover.
  • the protective member 10 further comprises an outer part 15 which extends radially way from the rotation axis A.
  • the transverse extension w of the outer part 15 in a plane perpendicular to the rotation axis A is substantially limited to the width of the operating arm 3 as measured parallel to that plane.
  • the outer part 15 has two oppositely arranged side walls 16, or tabs.
  • the side walls 16 extend substantially parallel to the rotation axis A.
  • the operating arm 3 is positioned between the side walls 16. The operating arm 3 is thus flanked by the side walls 16.
  • the height t of the side walls 16 in the direction of the rotation axis A may for example be in the range of 1-4 cm.
  • a flat, T-shaped piece 10' is provided.
  • the T-shaped piece 10' may be referred to as the protective member 10 in an unbent state.
  • the T-shaped piece 10' may have been cut from a large sheet.
  • the T-shaped piece 10' is typically made of a material capable of plastic deformation, for example a sheet metal.
  • the T-shaped piece 10' has a head with two side portions 16' and an intermediate portion 17' which is located between the side portions 16'.
  • the T-shaped piece also has a leg 18' which is joined with the head at the intermediate portion 17'.
  • the leg 18', the side portions 16' and the intermediate portion 17' are all generally rectangular in the illustrated example.
  • the height h' and width w' of the T-shaped piece 10' may for example be in the order of 10 cm.
  • the thickness d' of the T-shaped piece 10' may for example be in the order of 1 mm.
  • the side portions 16' are bent toward each other so as to form a respective angle with respect to the intermediate portion 17'.
  • the angle that each side portion makes with the intermediate portion 17' is substantially 90 degrees.
  • a hole 12 is provided in the leg 18'.
  • the hole 12 is usually made close to the end of the leg 18' that is distal to the head.
  • the leg 18' is punched so that a central zone 13 surrounding the hole 12 is pressed out of a plane of the leg 18'.
  • steps S3 and S4 may occur simultaneously, i.e. the making of the hole 12 and the punching of the leg 18' can be performed in one and the same action.
  • any reference signs placed between parentheses shall not be construed as limiting to the claim.
  • the word “comprising” does not exclude the presence of other elements or steps than those listed in the claim.
  • the word “a” or “an” preceding an element does not exclude the presence of a plurality of such elements.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)

Claims (9)

  1. Gleitschutzanordnung (1) für ein Fahrzeug mit Reifen, wobei die Gleitschutzanordnung (1) umfasst
    ein Reibrad (2), an dem mehrere Ketten (4) angebracht sind, die dazu bestimmt sind, unter einen Reifen geschleudert zu werden, um die Reibung zwischen dem Reifen und dem Boden zu erhöhen,
    einen Betätigungsarm (3), der drehbar mit dem Reibrad (2) verbunden ist, wobei der Betätigungsarm (3) dazu ausgebildet ist, mit dem Fahrzeug verbunden zu werden und das Reibrad (2) mit dem Reifen in Reibeingriff zu bringen, und
    ein Schutzelement (10), das ein Innenteil (11) umfasst, das um eine Drehachse (A) des Reibrades (2) und zwischen dem Reibrad (2) und dem Betätigungsarm (3) angeordnet ist,
    dadurch gekennzeichnet, dass
    eine Ausdehnung des Innenteils (11) in radialer Richtung weniger als 50 % eines Radius des Reibrades (2) beträgt,
    wobei das Schutzelement (10) ein Außenteil (15) mit einer Längsausdehnung radial weg von der Drehachse (A) umfasst,
    wobei eine Querausdehnung des Außenteils (15) in einer zur Drehachse (A) senkrechten Ebene im Wesentlichen auf eine Breite des Betätigungsarms (3), die parallel zu der Ebene ist, begrenzt ist, und wobei der Außenteil (15) ferner zwei Seitenwände (16) aufweist, die im Wesentlichen senkrecht zu der Ebene liegen und an gegenüberliegenden Seiten des Betätigungsarms (3) anliegen.
  2. Gleitschutzanordnung (1) nach Anspruch 1, wobei die Ausdehnung des Innenteils (11) in der radialen Richtung weniger als 20 % und vorzugsweise weniger als 10 % der Ausdehnung des Reibrades (2) in der radialen Richtung beträgt.
  3. Gleitschutzanordnung (1) nach Anspruch 2, wobei das Reibrad (2) ein auf der Drehachse (A) angeordnetes Lager umfasst, wobei ein Innenring des Lagers relativ zu dem Betätigungsarm (3) befestigt ist, und wobei das Innenteil (11) eine zentrale Zone (13) aufweist, die an dem Innenring anliegt, und eine periphere Zone (14), die von dem Reibrad (2) in einer Richtung parallel zur Drehachse (A) getrennt ist.
  4. Gleitschutzanordnung (1) nach Anspruch 3, wobei das Innenteil (11) als Schutzabdeckung für das Lager ausgebildet ist.
  5. Gleitschutzanordnung (1) nach einem der vorhergehenden Ansprüche, wobei das Schutzelement (10) aus einem Material hergestellt ist, das zur plastischen Verformung geeignet ist, beispielsweise Blech.
  6. Gleitschutzanordnung (1) nach einem der vorhergehenden Ansprüchen, wobei das Schutzelement (10) durch Biegen eines einzelnen flachen Stücks (10') aus einem ungebogenen Zustand in einen gebogenen Zustand geformt wurde, wobei das Stück (10') im ungebogenen Zustand T-förmig ist und einen Schenkel (18') und einen Kopf aufweist, wobei der Kopf zwei Seitenabschnitte (16') und einen Zwischenabschnitt (17') aufweist, der zwischen den Seitenabschnitten (16') angeordnet ist, wobei im gebogenen Zustand jeder Seitenabschnitt (16') einen im Wesentlichen senkrechten Winkel mit dem Zwischenabschnitt (17') bildet, wodurch die Seitenabschnitte (16') die Seitenwände (16) im gebogenen Zustand bilden.
  7. Verfahren zur Herstellung eines Schutzelements (10) für eine Gleitschutzanordnung (1), wobei die Gleitschutzanordnung (1) ein Reibrad (2) umfasst, an dem mehrere Ketten (4) angebracht sind, die dazu bestimmt sind, unter einen Reifen eines Fahrzeugs geschleudert zu werden, um die Reibung zwischen dem Reifen und dem Boden zu erhöhen, wobei das Reibrad (2) ferner drehbar mit einem Betätigungsarm (3) verbunden ist, der dazu ausgebildet ist, mit dem Fahrzeug verbunden zu werden und das Reibrad (2) mit dem Reifen in Reibeingriff zu bringen, wobei das Schutzelement (10) zur Anbringung an einer Drehachse (A) des Reibrades (2) vorgesehen ist, um zu verhindern, dass Gegenstände in einen Raum zwischen dem Reibrad (2) und dem Betätigungsarm (3) eingeführt werden, wobei das Verfahren umfasst:
    Bereitstellen eines flachen T-förmigen Stücks (10'), wobei das T-förmige Stück (10') einen Schenkel (18') und einen Kopf aufweist, wobei der Kopf zwei Seitenteile (16') und einen Zwischenabschnitt (17') aufweist, der zwischen den Seitenabschnitten (16') angeordnet ist;
    Biegen der Seitenabschnitte (16') zueinander, um zwei Seitenwände (16) zu bilden, die sich im Wesentlichen senkrecht von dem Zwischenabschnitt (17') erstrecken; und
    Formen eines Lochs (12) in dem Schenkel (18').
  8. Verfahren nach Anspruch 7, das ferner das Stanzen des Schenkels (18') umfasst, so dass eine zentrale Zone (13), die das Loch (12) umgibt, aus einer Ebene des Schenkels (18') herausgedrückt wird.
  9. Verfahren nach Anspruch 8, wobei das Stanzen des Schenkels und das Formen des Lochs in einem einzigen Stanzvorgang ausgeführt werden.
EP16189019.9A 2016-09-15 2016-09-15 Gleitschutzanordnung mit schutzelement Active EP3296125B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP16189019.9A EP3296125B1 (de) 2016-09-15 2016-09-15 Gleitschutzanordnung mit schutzelement
PCT/EP2017/073134 WO2018050744A1 (en) 2016-09-15 2017-09-14 Anti-skid arrangement with protective member
US16/333,072 US10807414B2 (en) 2016-09-15 2017-09-14 Anti-skid arrangement with protective member

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16189019.9A EP3296125B1 (de) 2016-09-15 2016-09-15 Gleitschutzanordnung mit schutzelement

Publications (2)

Publication Number Publication Date
EP3296125A1 EP3296125A1 (de) 2018-03-21
EP3296125B1 true EP3296125B1 (de) 2019-05-15

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ID=56936364

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16189019.9A Active EP3296125B1 (de) 2016-09-15 2016-09-15 Gleitschutzanordnung mit schutzelement

Country Status (3)

Country Link
US (1) US10807414B2 (de)
EP (1) EP3296125B1 (de)
WO (1) WO2018050744A1 (de)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2543876A (en) * 1949-04-23 1951-03-06 William P C Smith Hydraulic power unit with fixed piston for producing oscillating motion
CH642006A5 (de) * 1978-04-10 1984-03-30 Goeran Toernebaeck Gleitschutzvorrichtung fuer fahrzeugraeder an einem kraftfahrzeug.
EP0195973B1 (de) * 1985-03-14 1990-01-17 Gerd Schulz Fahrzeug- und Container-Technik Schleuderkettenaggregat für Kraftfahrzeuge
SE503505C2 (sv) 1994-10-19 1996-06-24 Vbg Prod Ab Slirskyddsanordning
DE602005009002D1 (de) 2005-12-15 2008-09-25 Vbg Ab Schwenkvorrichtung für eine Schleuderkettenanordnung eines Kraftfahrzeuges
US7766387B1 (en) * 2007-08-02 2010-08-03 Onspot Of North America, Inc. Anti-skid tire chain device
US20110146866A1 (en) * 2009-12-19 2011-06-23 Samad Jafari Valilou Automatic tire chain system
EP3296124A1 (de) * 2016-09-15 2018-03-21 VBG Group AB (Publ) Gleitschutzanordnung für ein fahrzeug

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
WO2018050744A1 (en) 2018-03-22
EP3296125A1 (de) 2018-03-21
US10807414B2 (en) 2020-10-20
US20190263176A1 (en) 2019-08-29

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